alpha,standard_dev,size!This function is available for compatibility with Excel 2008 and earlier.Returns the confidence interval ...

!alpha,standard_dev,size!!This function is available for compatibility with Excel 2008 and earlier.Returns the confidence interval for a population mean, using a normal distribution!is the significance level used to compute the confidence level, a number greater than 0 and less than 1!is the population standard deviation for the data range and is assumed to be known. Standard_dev must be greater than 0!is the sample size!